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Dispute over method to detect gravitational redshift

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Does an atom interferometer test the gravitational redshift at the Compton frequency?
The published version of the paper "Does an atom interferometer test the gravitational redshift at the Compton frequency?" Wolf P et al  2011 Class. Quantum Grav. 28 145017 will be freely available online from Thursday 9 June.

Classical and Quantum Gravity
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